What Causes the Colors of a Sunset and Why Does It Change?

Sunsets are like nature’s painting party, and the sky is the canvas.

When the sun goes down, its light has to travel farther through Earth's atmosphere. This long journey makes light scatter, it’s like when you shine a flashlight through a foggy room; the light bounces around, making things look different.

During the day, we see blue because blue light scatters more easily. But at sunset, the path is longer, and most of the blue and green light gets scattered away. That leaves behind red, orange, and pink, which are like the bold colors in a crayon box, they stay behind to paint the sky.

Sometimes you see purple or yellow, too! It depends on how much dust, clouds, or pollution is in the air. These act like extra filters, changing the color show just like different kinds of sunglasses change what you see.

The sky changes colors because it’s a big, magical filter, and every sunset is a new painting!